/*
 * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xpath.internal.objects;

import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xpath.internal.XPathContext;

/*
 *
 * @author igorh
 *
 * Simple wrapper to DTM and XPathContext objects.
 * Used in XRTreeFrag for caching references to the objects.
 */
public final class DTMXRTreeFrag {
    private DTM m_dtm;
    private int m_dtmIdentity = DTM.NULL;
    private XPathContext m_xctxt;

    public DTMXRTreeFrag(int dtmIdentity, XPathContext xctxt) {
        m_xctxt = xctxt;
        m_dtmIdentity = dtmIdentity;
        m_dtm = xctxt.getDTM(dtmIdentity);
    }

    public final void destruct() {
        m_dtm = null;
        m_xctxt = null;
    }

    final DTM getDTM() {
        return m_dtm;
    }

    public final int getDTMIdentity() {
        return m_dtmIdentity;
    }

    final XPathContext getXPathContext() {
        return m_xctxt;
    }

    public final int hashCode() {
        return m_dtmIdentity;
    }

    public final boolean equals(Object obj) {
        if (obj instanceof DTMXRTreeFrag) {
            return (m_dtmIdentity == ((DTMXRTreeFrag) obj).getDTMIdentity());
        }
        return false;
    }

}
